Locking collar



FIG. 1 is a top, front left perspective view of a locking collar showing our new design.

FIG. 2 is a bottom, rear right perspective view thereof.

FIG. 3 is a left side elevation view thereof.

FIG. 4 is a front elevation view thereof.

FIG. 5 is a top plan view thereof.

FIG. 6 is a rear elevation view thereof.

FIG. 7 is a right side elevation view thereof.

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is a top plan view of the locking collar of FIG. 1, with the clamping fastener shown in an extended position.

The broken lines in the figures illustrate environment and form no part of the claimed design. 

CLAIM The ornamental design for a locking collar, as shown and described. 